Benzothiazepines



United States Patent 3,075,968 BENZOTI IIA-ZEPINES John Krapcho, New Brunswick, N.J., assignor to Olin Mathieson Chemical Corporation, New York, N.Y., a

corporation of Virginia No Drawing. Filed-Sept. 18, 1961, Ser..No. 138,623

9 Claims. (Cl. 260-4393) This invention relates to new chemical compounds having valuable therapeutic properties and processes for the preparation thereof.

The therapeutically active compounds of this invention are bases of the general Formula I:

and salts thereof, wherein X is hydrogen, lower alkyl, lower al koxy, nitro, halo or trifluoromethyl; R is hydrogen, lower alkyl, an X-substituted phenyl lower alkyl, an X-substituted phenyl, iuryl, thienyl, pyridyl or piperonyl; A is lower alkylene (preferably ethylene and pro py1ene); and NB is a basic nitrogen-containing radical of less than twelve carbon atoms. Among the suitable radicals represented by the symbol NB are: amino;

(lower alkyUamino; di(lower alkyl)amino; (hydroxylower alkyl)amino; di(hydroxy-lower alkyl)amino; phenyl(lower alkyl)amino;' N-(lower alkyl)-N-phenyl- '(lower alkyl)amino; and saturated 5 to 6 membered monocyclic'heterocyclic radicals of less than twelve carbon atoms, as exemplified by piperidino; (lower alkyl)- piperidino; \di(lower alkyl)piperidino; (lower ,alkoxy)piperidino; '2, 3 or 4-piperidyl; 2, 3 or 4-(N-lower alkylpiperidyl); pyrrolidino; (lower alkyl)pyrrolidino; di- '.(lower.alkyl )pyrrolidino; (lower alkoxy)pyrrolidino; 2

"or 3-pyrrolidyl; 2 or.3+(N.-lower alkyl-pyrrolidyl); morpholino; (lower ..alkyl)-morpholino; thiamorpholino; (lower al kyl)thiamorpholi no; di(lower alkyl)thiamorpholino; (lower alkoxy) thiamorpholino; piperazino; (lower alkyDpipera zino; (e. g.,- N -methyl-pipera'zino); di- (lower alkyl)piperazino; (lower alkoxy )pipera zino; (hy- ,piperazino); (lower allranoyloxy lower alkyl) piperazino; :(e.g., N -2-acetoxyethylpiperazino)v; .and (lower alkoxy lower aIkyDpiperazino. Theterms .loweral-kyl, flower alkoxy, and flower alkylene, asemployed .herein, .in-

clude both straight and branched chain radicals of less than eight carbon ,atoms. "Ihetparticularly preferred compounds are those whereinX is hydrogen or chloro, Ris phenyhA is ethylene or trim ethyl'e'n'e andNB is di(lower alkyl)amino.'

:As to the. salts, f those coming .withinthepurview of 1th isinv ention' include the acid-addition salts, particularly ,t he,nontoxie acid-addition salts, and the quaternary am- .imonium. salts. :Acids, usefulfor preparing the acid-ad dition salts, include, inter alia, inorganic acids, such as the hydrohalic acids (e.g., hydrochloric and hydrobromic acid),. sul.furic acid, nitric acid, boric acid and phosphoriejacid, and organic (acids, such as oxalic, tartaric, citric, acetic and succinic acid, theophylline and 8 chlorotheophylline. The quaternary ammonium ,salts include those "formed with vlower alk yll'halides (e.g., 3 methyl bromide, ethyl chloride and .propyl iodide) and .di-lower alkyl sulfates (e.g. dimethyl sulfate).

The compounds of thisinvention. are therapeutically active compounds which are useful as tranquilizers and thus;;can' bewadministered. perorally in thesame manner 3,075,968 Patented Jan. 29, 1963 as .Chlordiazepoxide in the treatment of irrational fears, anxiety and tension, the dosage for such treatment beg adjust d f r th a t vity f th par ular comp und emp o Ihe c mPQunds of this invention can be prepared ,by condensing new intermediates of this invention of the Formula -II:

wherein X and R are as hereinbefore defined, with an aniinoalkyl halide of the formula BN A Y, wherein BN- and A areas hereinbefore defined and Y is halide, particularly chloride. This reaction is preferably conducted by heating the reactants in vthe presence of a basic condensing agent Such as an alkalimetal, an alkali metal amide ,(e.g., sodamide), or an alkali metal hydroxide. To form the acid-additional salts, the free base initially formed is interacted withatleast one equivalent of the desiredacid.

To prepare .the starting materials (the vcompounds of Formula II) a 2-aminothiophenol ofrtheFormula III:

rrr

wherein X is as hereinbefore definedis interacted with a propioloicacid derivative of the Formula IV:

( r si fpos wherein :R is as .hereinbefore defined.

Suitable reactants III include ZV-aminobenzenethiol; 2-

,amino-(lower I alkyl benzene thiols, such as 2 -aminotoluenethiols' (egl, 2-amino-4 -tolu'e nethi-ol)," 2,aniino-ethyllben'zenethiols', 2 amino-n propylbenzenethiols, IZ-amin oisopropylbenzenethipls, '2 amino-butylbenzenethiols,""and Zfaminohexylbengenethiols; 2-amino-lower alkQKybent eruethiols," .such Z-aniino-rn'ethbxybenzenethiols f(e.g., 2arnino- 4 metl 1=oxybenzenethiol), ZaminO-ethoXyben ene- .th q s a i o-nrp op xy enz n t i ,and la ina-Pa methyl phenylpropiolic .acid, ,p ethyl phenylpropiolic jaci-d, psinethoxy-phenylptopiolic acid, p e,tl711oxy phenylpropiolic acid, p-trifiuoromethylphenylpropiolicacid, p-

chlorophenylpropiolic acid, 3 -o-tolyl-tetrolic acid and 5- p-met-h'oxyphenyl-Z-pentynoic acid); piperonylpropiolic i (2: Y ).P 9P l YUPIQPiQl c d; thie'nyDp'r'opi'olic' acid; (3'- fu-'ryl)propiolic acid} (Z-pyridyl)propiolic acid; '(3-pyridyl)propiolic acid; and (4- u pyridyl) propiolic, acid.

- The followingciiam les illustrate the invention (all temperatures being in centigrade) EXAMPLE i1 Z-Phenyl-I ,5-Benzthiazepin-4 (H) -One To 79.0 g. of phenylpropiolic acid is added 68.0 g. of Z-amin-obenzenethiol. This mixture is cooled to control the exothermic reaction. The mixture is then heated slowly to 160 and then maintained at 160-180 for one hour. The solution is cooled to 100 and the resulting semi-solid treated with 250 ml. of warm acetonitrile. After cooling, the crystalline product Weighs about 40 g., M.P. about 212-215". Following recrystallization from dimethylforamide, the product melts at about 2152l7.

EXAMPLE 2 5- (Z-Dimethylam inoethyl) -2-Phenyl-I ,S-Benzofhiazepin- 4-(5H) -One Hydrochloride A suspension of 6.9 g. of Z-phenyl-l,S-benzothiazepin- 4(5H)-one in 200 ml. of toluene is added to a suspension of 1.1 g. of sodamide in 100 ml. of toluene. This mixture is warmed to 50 to obtain a solution, cooled to 30 and treated with a solution of 4.3 g. of Z-dimethylarninoethyl chloride in 31 ml. of toluene. This solution is heated at 60-70 for four hours, cooled and treated with 100 ml. of water. The organic phase is extracted with a solution of ml. of conc. hydrochloric acid in 100 ml. of water. The aqueous phase is cooled and treated with a cold solution of 8 g. of sodium hydroxide in 20 ml. of water. The base is extracted three times with 200 ml. portions of ether and dried over magnesium sudfate. After evaporation of the solvent, the residual oil weighs about 7.5 g. A solution of 7.0 g. of this material in 20 ml. of absolute alcohol is treated with 3.6 ml. of 6 N alcoholic hydrogen chloride. Dilution of this solution with 200 ml. of ether gives about 7.5 g. of colorless product, M.P. about 216- 218. After crystallization from 300 ml. of acetonitrile, the colorless product melts at about 220-221.

EXAMPLE 3 5 -(3-Dimethylam inopropyl -2-Phenyl-1 ,5 -Benzothiazepin- 4 (5H -0ne Hydrochloride A suspension of 15.2 g. of 2-phenyl-1,S-benzothiazepin- 4-(5H) -one in 400 ml. of toluene is added to a suspension of 2.4 g. of sodamide in 200 ml. of toluene. The mixture is warmed to 50 to obtain a solution, cooled to 30 and treated with 8.5 g. of 3-dimethylaminopropyl chloride. This mixture is refluxed for three hours and the product then isolated in the same manner as in Example 2 to give about 18 g. of the hydrochloride salt, MP. about 159161. After crystallization from 40 ml. of acetonitrile, the color-less salt weighs about 15.5 g., M.P. about 162-164".

EXAMPLE 4 2-(4-Methylphenyl) -1,5-Benzothikzzepin-4(5H -0ne Substitution of 4-methylphenylpropiolic acid for phenylpropi-olic acid in Example 1 yields 2-(4-methylphenyl)- 1 ,5 -benzothiazepin-4 (5 H) -one.

EXAMPLE 5 5-(2-Dimethy laminae thyl) -2- (4-Methylphenyl) -1,5- Benz0thiazepin-4 (5H) -One Hydrochloride Following the procedure of Example 2 but substituting 7 g. of 2-(4-methyl-phenyl)-1,5-benzothiazepin-4(5H)- one for the 2-phenyl-l,5-benzothiazepin-4(5H)-one, 5- (Z-dimethylaminoethyD-Z (4 methylpheny1)-1,5-benzothiazepin-4(5H)-one hydrochloride is obtained.

EXAMPLE 6 Z-Phenyl-S-(Z-Diethylaminoethyl) -1,5-Benzoth iazepin- 4 (5H -One Hydrochloride Following the procedure used in Example 2 but substituting an equivalent amount of Z-diethylaminoethyl chloride for the Z-dimethylarninoethyl chloride, 2-phenyl- 4 S-(Z-diethylaminoethyl)-1,5-benzothiazepin-4(5H) one hydrochloride is obtained.

EXAMPLE 7 Z-Phenyl-S [2-(1 -Pyrrolidinyl Ethyl 1 -1 ,5 -Benzothiazepin- 4 (5H) -One Hydrochloride Following the procedure used in Example 2 but substituting an equivalent amount of 2-(1-pyrrolidinyl)ethyl chloride for the 2-dimethylaminoethyl chloride, 2-pheny1- 5-[2-(l-pyrrolidinyl)ethyl] 1,5 benzothiazepin-4(SH)- one hydrochloride is obtained.

EXAMPLE 8 Z-Phenyl-S-[Z (N-Methyl-N-Phenezhylamino)Ethyl]- 1,5-Benzothiazepin-4 (5H)-One Hydrochloride Substitution of an equivalent quantity of Z-(N-methyl- N-phenethylamino)ethyl chloride for the Z-dimethylaminoethyl chloride in Example 2 gives Z-phenyl-S-[Z- (N-methyl)-N-phenethyl-amino)ethyl] 1,5 benzothiazepin-4 (5H -one hydrochloride.

EXAMPLE 9 2-M ethyl-1 ,5 -Benzothiazepin-4 (5H -One Following the procedure of Example 1 but substituting an equivalent amount of tetrolic acid for the phenylpropiolic acid, Z-methyl-1,5-benzothiazepin-4(5H)-one is obtained.

EXAMPLE 10 Z-Methyl-S- (Z-Dimethy laminoethyl -1,5-Benz0thiazepin-4 (5H -0ne Hydrochloride Following the procedure of Example 2 but substituting an equivalent amount of 2-methyl-1,5-benzothiazepin- 4(5H)-one for the 2-phenyl-1,5-benzothiazepin-4(5H)- one, Z-methyl 5 (2 dimethylaminoethyl)-1,5-benzothiazepin-4-(5H)-one hydrochloride is obtained.

EXAMPLE 1 1 2- (4-Methoxyphenyl) -1,5-Benz0thiazepin-4 (5H) -One Folowing the procedure of Example 1 but substituting an equivalent amount of p-methoxyphenylpropiolic acid for the phenylpropiolic acid, 2-(4-methoxyphenyl)-1,5- benzothiazepin-4(5H)-one is obtained.

EXAMPLE l2 2-(4-Methoxyphenyl) -5-(2-Dimethylaminoethyl)-1,5- Benzothiazepin-4 (5H)-One Hydrochloride Z-(o-Methoxyphenyl) -5-(Z-Dimethylaminoethyl) -1,5-

Benzothiazepin-4 (5H) -One Hydrochloride Following the procedure of Examples 1 and 2 but substituting Z-methoxyphenylpropiolic acid for the phenylpropiolic acid in Example 1, Z-(o-methoxyphenyD-S-(Z- dimethylaminoethyl)-1,5-benzothiazepin 4(5H) one is obtained.

EXAMPLE 14 2(p-Chlorophenyl) -5-(Z-Dimethylaminoethyl)-1,5- Benzothiazepin-4 (5H)-One Hydrochloride (:1) Preparation of Z-(p-chlorphenyl)-1,5-benzothia zepin-4(5H)-one.-A mixture of 173 g. of p-chlorophenylpropiolic acid and 119 g. of Z-arninobenzenethiol is heated in an oil bath for two hours at 200. After cooling, the product is purified by crystallization from dimethylformamide.

(b) Preparation of Z-(p-chlorophenyl)-5-(2-dimethylaminoethyl) -1,5-benzothiazepin-4(5H) one hydrochloride.-8.7 g. of 2-(p-chlorophenyl)-1,5-benzothiazepin- 4(5H)-one is reacted with 1.25 g. of sodamide and 3.8 g. of Z-dimethylaminoethyl chloride according to the pro- EXAMPLE 15 Z-(Z-Furyl)-5-(Z-Dimethylaminoethyl)-1,5-Benzothiacedure described in Example 2.

zepin-4 (5H) -ne Hydrochloride (a) Preparation of 2-(Z-faryl)-1,5-benzothiazepin- 4(5H)-one.--A mixture of 42 g. of .2-furanpropiolic acid and 38 g. of 2-.aminobenzenethiol is heated in an oil bath at l7()180 for one hour. After cooling, the product is purified by crystallization from acetonitrile.

(b) Preparation of 2-(Z-furyl)-5-(2-dimethylamin0- ethyl-1,S-benzothiazepin-4 (5H) -one hydrochl0ricle.-12 g. of 2-(2-furyl)-1,5-benzothiazepin-4(5H)-one is reacted with 2.0 g. of sodamide and 6.1 g. of12-dimethylaminoethyl chloride according to the procedure described in Example 2.

EXAMPLE 1'6 .2-(3-Piperonyl) -(2 Dimeflzylaminoethyl) 1,5-Benz0- thiazepin-4 (5H) -0ne Hydrochloride Following the procedure of step (a) and (b) of :Example '15 but substituting an equivalent-quantity of piperonyl propiolic acid for the Z-furan propiolicacid .in'step (a), 2(3-piperonyl)-5-(dimethylaminoethyl) 1,5-benzothiazepin-4(5H')-one hydrochloride is obtained.

piolic acid and (2'-thienyl)propiolic acid for the 2-furanpropiolic acid in step (a), 3-(4-pyridyl)-5-(Z-dimethylaminoethyl)-l,5-benzothiazepin '4(5H-) --one=hydrochloride, '2-(2-pyridyl) +5-(2=dimethy1aminoethyl)-l;5-b,enzo- -thiazepin-4(5H)-one hydrochloride, and 2- (2-thienyl)-5- (2 dimethylaminoethyl)-1,5-benzothiazepin-4(5 H)-one hydrochloride are obtained, respectively.

EXAMPLE 17 5-(2-Morpholinoethyl) -2-Phenyl-1,5-Benzothiazepin- 4 (5H) -0ne Hydrochloride 5-(Z-Piperidinoethyl)-2-Phenyl-I,5-Benzothiazepin-4- One Hydrochloride Following the procedure of Example 2 but substituting an equivalent amount of Z-piperidinoethyl chloride for the Z-dimethylamionethyl chloride, 5-(2-piperidinoethyl)- 2-phenyl-1,5-benzothiazepin-4(5H)-one hydrochloride is obtained.

EXAMPLE 19 5- [3-(4-Methyl-1-Piperazinyl) Propyl] -2-Phenyl1 ,5 Benz0thiazepin-4 (5H) -One H ydrochloride Following the procedure of Example 2 but substituting an equivalent amount of l-methyl-4-(3-chloropropyl)- piperazine for the Z-dimethylaminoethyl chloride, 5-[3- (4 methyl l-piperazinyl)-propyl]-2-phenyl-1,5-benzothiazepin-4(5H)-one hydrochloride is obtained.

EXAMPLE 20 7 -Chl0r0-2-Ph enyl- -(2-Diethylaminbeth l) -1,5- Benz0thiazepin-4 (5H) -One Hydrochloride Following the procedures of Examples 1 and 2 but substituting an equivalent amount of 2-amino-4-chlorothiophenol for the Z-aminobenzenethiol in Example 1, 7-

E .Sirn1larly,.by following the procedure of Example 15 .but substituting (4-pyridyl)propiolic acid, (2-pyridyl)pro- "6 chloro-vz-phenyla- 5- (2-.diethylaminoethyl 1,5 bfillZQ- thiazepin-4(5H)-one hydrochloride is obta ned.

EXAMPLE 2.1 7-Methy'l-2-Pheny'l-5-(2-Diethylamin0eth l9 J ,5- Benz thiazepin 4UH) -One H ydrachloride Following the procedure of Examples '1 and 2 but-substituting an equivalent amount of 2-amino-4rtoluenethiol for the Z-aminobenzenethiol in Example 1, 7-methyl12- phenyl-S-(21diethylaminoethyl) ,1,'5 henzothiazepin-a- .(5H)-one hydrochloride is obtained.

EXAMPLE 22 .7-Methoxy-2-Ph 819 (Z-Diethylamin ethyD ,5- BenzQthiaz epin-4 (511) -One Hydrochloride Following the procedure of Examples 1 and 12 but substituting an equivalent amountof j2-amino-4-methoxybenzenethiol for the jZ-aminobenzenethiol in Example 1, 7 methoxy '2 phenyl 5 (2 diethylaminOethyD-LS- benzothiazepin-4(5H)-one hydrochloride is obtained.

EXAMPLE 23 7-( Trifluoromethyl) -2-Phertyl-5 (2-Dietl1ylaminoethyl) -1,5-Benzothiazepin-4-0ne H ydrqchlqride 1,5-Benzothiazepin-4(5H,):One

Following the procedure. of Example 1 but substituting anequivalent amount of propiolicacid for the phenylpropiolic acid, 1,5-benzothiazepin-4(5H)-one is obtained.

EXAMPLE 25 5- (Z-Dimethylaminbethyl) ,5-Benz0thiazepin-4 (5H) One H ydrochloride Following the procedure of Example 2 but substituting an equivalent amount of 1,5-benzothiazepin-4(5H)-one for the 2-phenyl-1,5-benzothiazepin-4(5H)-one, 5-(2-dimethylaminoethyl) -l ,5-benzothiazepin-4 (5H) -one hydrochloride is obtained.

EXAMPLE 26 5 -(2-Dimethylaminoethyl -2-Phenyl-1 ,5 -Benzothiazepin-4 (5H -One M ethobrom ide A solution of 3.6 g. of S-(Z-dimethyIaminOethyD-Z- phenyl-1,5benzothiazepin-4(5H)-one hydrochloride in 30 ml. of water is treated with a solution of 1.5 g. of potassium carbonate in 10 ml. of water. The liberated base is extracted three times with 50 ml. portions of ether. The ether solutions are combined, dried over magnesium sulfate, filtered and the solvent evaporated on a steam bath. The residue is dissolved in 30 ml. of acetonitrile, cooled, and treated with 5 g. of methyl bromide. After standing for twelve hours, the mixture is diluted with ether and the crystalline product is filtered and dried.

This invention may be variously otherwise embodied within the scope of the appended claims.

What is claimed is:

1. A compound selected from the group consisting of bases of the formula quaternary ammonium salts formed with lower alkyl halide and di-lower alkyl sulfates thereof, wherein X is selected from the group consisting of hydrogen, lower alkyl, lower alkoxy, nitro, halo and trifluoromethyl; R is selected from the group consisting of hydrogen, lower alkyl, mono-X-substituted phenyl-lower alkyl, mono-X- substituted phenyl, furyl, thienyl, pyridyl and piperonyl; A is lower alkylene and NB is selected from the group consisting of amino, (lower alkyl)amino, di-(lower alkyl) amino, (hydroxy-lower alkyl)amino, di(l1ydroXy-lowe1' alkyl) amino, phenyl(lower a1kyl)arnino, N-(lower alkyl) phenyl(lower alkyl)amino, piperidyl, (lower alkyl)- piperidyl, di(lower alkyl)piperidino, (lower alkoxy)piperidino, pyrrolidyl, (lower alkyl)pyrrolidyl, di(lower alkyl) pyrrolidino, (lower alkoxy)pyrrolidino, morpholino, (lower alkyDmorpholino, thiamorpholino, (lower alkyl) thiamorpholino, di(l0wer a1kyl)thiamorpholino, (lower alkoxy)thiamorpholino, piperazino, (lower alkyl)piperazino, di(lower alkyl)piperazino, (lower alkoxy)pipera zino, (hydroxy-lower alkyl)piperazino, (lower alkanoyloxy lower alkyljlpiperazino and (lower alkoxy lower alkyl)piperazino.

2. A compound of the formula (lower alkyl) ower alkyleue) I- (lower alkyl) N-C=O 3. A pharmaceutically-acceptable acid-addition salt of the compound of claim 2.

8 4. A compound of the formula (lower alkyl) (lower alkylene) -N- (lower alkyl) NC=O 5. A pharmaceutically-acceptable acid-addition salt of the compound of claim 4.

6. A compound of the formula (lower alkyl) (lower alkylene) -N- (lower alkyl) No=o S 0- (lower allryl) 7. A pharmaceutically-acceptable acid addition salt of the compound of claim 6.

8. A pharmaceutically-acceptable acid-addition salt of 5 (2 dimethylaminoethyl) 2 phenyl 1,5 benzothiazepin-4(5H)-one. 9. A pharmaceutically-acceptable acid-addition salt of 5 (3 dirnethylaminopropyl) 2 phenyl 1,5 benzothiazepin-4(5H)-one.

References Cited in the file of this patent UNITED STATES PATENTS De Stevens Dec. 6, 1960 Winthrop et a1. June 20, 1961 OTHER REFERENCES Mills et al.: Jour. Chem. Soc., 1927, pages 2738-46. Royals: Advanced Organic Chemistry, 1956, page 533. Ried et al.: Chem. Berichte, volume 90, pages 2683- 87 (1957).

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 3 O75,968 January 29, 1963 John Krapcho It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 3,, line 29, for sudfate" read sulfate column 5 Example 15 strike out second line of the title "cedure described in Example 2."; column 6, line 27, for "fluoro-" read triflu0ro+ Signed and sealed this 29th day of October 1963.

(SEAL) Attest:

ERNEST W. SWIDER EDWIN L. REYNOLDS Attesting Officer A 1; i ng Commissioner of Patents 

1. A COMPOUND SELECTED FROM THE GROUP CONSISTING OF BASES OF THE FORMULA
 8. A PHARMACEUTICALLY-ACCEPTABLE ACID-ADDITION SALT OF THIAZEPIN-4(4H)-ONE. 